engadget.com— he new CMOS unit can handle 60fps 720p, or 30fps 1080p videos, and Micron hopes to start sampling the sensor this fall. Micron also has a new sensor with similar specs, but designed for camcorders,
Sep 20, 2006View in Crawl 4
Sirber6 There is a huge difference. A cmos chip has a lower quality output because the conversion from analog to digital happens on the chip. CCD chips are more efficient at transferring the light into a signal without distortion. CCD chips require separate processing not done on the chip and they consume more power. CCDs also can pick up more detail in lower light.
@ the comment over on Engadget: 1920 x 1080 ~ 2 Mpx, so 5 Mpx should provide redundancy.@ Digg: Can anyone comment on what the *first* chip is for if the other one will be for camcorders? I was thinking both would be for camcorders, since both are spec'ed with frame rates. Thanks to Digg4all for the clarification. Good stuff.
First, yes, there is a difference between CCD and CMOS produced images. Not only are there cosmetic differences, like the pattern the produce, but there are also operational differences. What is particularly critical is the signal to noise ratio of any given system, as cinematographers like to be able to shoot through as much latitude as they can. CCDs have very high uniformity, which is why they are very popular for HD units where a lack of uniformity can just look, well, awful.Second, this is for motion, not still, and processing out raw files (even if you had that capability) would be so much data and time, it wouldn't be worth it. Thirty progressive scans per second, 3:1 shooting ratios? Besides, color isn't totally software dependent. The quality of the glass in FRONT of the chip makes a large difference in color as well.
The first one is for still cameras. Currently most digital still cameras cannot use the entire 5+MP chip for video capture since it can't process the info quick enough. Current still cameras limit the video resolution to a small portion of the sensor, usually somewhere around 1MP. That is why video cameras tend to only have 1 or 2MP chips in them. Thus why you shouldn't buy an all in one type camera. however this could change the market so they can sell a camcorder/camera with a good enough resolution to do both well.
@thescimitarThis is true. Additionally, the recording medium used also affects color rendition. DVCPro50 and DVCProHD both use 4:2:2 with chroma sub-sampling. DV is 4:1:1, HDV is 4:2:0. This is especially important in regards to processing video's latitude. (BTW ratio is chroma:luma:luma OR greyscale:color:color ...kind of)
Closed AccountSep 21, 2006
Sirber6 There is a huge difference. A cmos chip has a lower quality output because the conversion from analog to digital happens on the chip. CCD chips are more efficient at transferring the light into a signal without distortion. CCD chips require separate processing not done on the chip and they consume more power. CCDs also can pick up more detail in lower light.
marktwenSep 21, 2006
@ the comment over on Engadget: 1920 x 1080 ~ 2 Mpx, so 5 Mpx should provide redundancy.@ Digg: Can anyone comment on what the *first* chip is for if the other one will be for camcorders? I was thinking both would be for camcorders, since both are spec'ed with frame rates. Thanks to Digg4all for the clarification. Good stuff.
thescimitarSep 21, 2006
First, yes, there is a difference between CCD and CMOS produced images. Not only are there cosmetic differences, like the pattern the produce, but there are also operational differences. What is particularly critical is the signal to noise ratio of any given system, as cinematographers like to be able to shoot through as much latitude as they can. CCDs have very high uniformity, which is why they are very popular for HD units where a lack of uniformity can just look, well, awful.Second, this is for motion, not still, and processing out raw files (even if you had that capability) would be so much data and time, it wouldn't be worth it. Thirty progressive scans per second, 3:1 shooting ratios? Besides, color isn't totally software dependent. The quality of the glass in FRONT of the chip makes a large difference in color as well.
archerxSep 21, 2006
@ kanefsky Wrong, NTSC (USA) = 30fps, PAL (Europe) = 25fps, Cinema = 24fps.
sirberSep 21, 2006
sure the glass does most of it.some doc about CMOS and CCD:<a class="user" href="http://www.dalsa.com/markets/ccd_vs_cmos.asp">http://www.dalsa.com/markets/ccd_vs_cmos.asp</a>
broodlingerSep 21, 2006
Someone should tell NASA! They're still sending up probes with 1Mpixel unfiltered CCD's.
Closed AccountSep 21, 2006
The first one is for still cameras. Currently most digital still cameras cannot use the entire 5+MP chip for video capture since it can't process the info quick enough. Current still cameras limit the video resolution to a small portion of the sensor, usually somewhere around 1MP. That is why video cameras tend to only have 1 or 2MP chips in them. Thus why you shouldn't buy an all in one type camera. however this could change the market so they can sell a camcorder/camera with a good enough resolution to do both well.
gregcottenSep 21, 2006
Who do you shoot for? Varicams are nice stuff.
gregcottenSep 21, 2006
@thescimitarThis is true. Additionally, the recording medium used also affects color rendition. DVCPro50 and DVCProHD both use 4:2:2 with chroma sub-sampling. DV is 4:1:1, HDV is 4:2:0. This is especially important in regards to processing video's latitude. (BTW ratio is chroma:luma:luma OR greyscale:color:color ...kind of)